/* 
* Copyright (C) 2001-2009, CompHEP Collaboration
* Copyright (C) 1997, Alexander Pukhov
*------------------------------------------------------
*/
#include "f_c.h"
#include <math.h>

double 
pow_dl (double ap, long bp)
{
  double pow, x;
  long n;
  unsigned long u;

  pow = 1;
  x = ap;
  n = bp;

  if (n != 0)
    {
      if (n < 0)
	{
	  n = -n;
	  x = 1 / x;
	}
      for (u = n;;)
	{
	  if (u & 01)
	    pow *= x;
	  if (u >>= 1)
	    x *= x;
	  else
	    break;
	}
    }
  return (pow);
}

double 
d_int (double x)
{
  return ((x > 0) ? floor (x) : -floor (-x));
}